216725292 has 72 divisors (see below), whose sum is σ = 628301856. Its totient is φ = 61703424.

The previous prime is 216725291. The next prime is 216725293. The reversal of 216725292 is 292527612.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (216725291) and next prime (216725293).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (216725291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78528 + ... + 81240.

Almost surely, 2^216725292 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216725292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314150928).

216725292 is an abundant number, since it is smaller than the sum of its proper divisors (411576564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216725292 is a wasteful number, since it uses less digits than its factorization.

216725292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3047 (or 3042 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 216725292 is about 14721.5927127468. The cubic root of 216725292 is about 600.6708163961.

The spelling of 216725292 in words is "two hundred sixteen million, seven hundred twenty-five thousand, two hundred ninety-two".